Kenneth Zierer, M.D.
Gastroenterology Physician · Rutherford, NJ
Kenneth Zierer, M.D. is a gastroenterology physician with a practice address in Rutherford, New Jersey, and NPI 1417978883, issued on Jul 21, 2006. Check the license (New Jersey 25MA5838900, as entered in NPPES) on the New Jersey State Board of Medical Examiners; the Medicare figures below come from public CMS files.
- Name
- Kenneth Zierer
- Credential
- M.D.
- Primary taxonomy
- Gastroenterology Physician 207RG0100X
- License number
- 25MA5838900 NJ
Self-reported in NPPES; status is on the state search - Practice location
- 71 Union Ave Ste 201, Rutherford, NJ 07070
- Phone
- (201) 842-0020
- Enumerated
- Jul 21, 2006
- Record last updated
- Aug 9, 2023
- Fax
- (201) 842-0010
- Medicaid ID
- 6956602 NJ
- Medicare enrollment
- Enrolled (PECOS I20060113000415); accepts Medicare assignment
- Medical or professional school
- Rutgers New Jersey Medical School, 1988
- Entity
- Type 1 · individual
8 nearest gastroenterology physician records → All 735 in New Jersey → Look up another NPI →
Verify Kenneth Zierer in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersNew Jersey State Board of Medical Examiners
Search for license 25MA5838900Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
51% more Medicare Part D claims than the average gastroenterology physician in 2024
1,223 Medicare Part D claims for 305 beneficiaries, against an average of 811 among the 16,445 providers of this specialty who prescribed in Part D. Brand-name drugs were 6% of claims.
Most prescribed
- Pantoprazole Sodium494 claims
- Ursodiol73 claims
- Omeprazole63 claims
- Famotidine61 claims
- Gavilyte-G43 claims
- Sucralfate36 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
The MIPS final score for 2023 (Medicare payment program): 100 of 100
The Merit-based Incentive Payment System score is reported for this clinician. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $1,357.34
71 payments; by number, the most common kind was food and beverage; the largest payer was Phathom Pharmaceuticals, Inc. The 13,350 providers of this specialty with any payment received $5,015.95 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- Gastroenterology Associates OF New Jersey LLCToms River, NJ
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Kenneth Zierer among 735 gastroenterology physician records in New Jersey
Kenneth Zierer, M.D. is one of 735 gastroenterology physician records with a practice address in New Jersey. 89% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 12% of them.
- NPI issued2006 · 12% of these records are older, 44% newer
- In a Medicare fileYes · 89% of these records are
- In the CMS Doctors and Clinicians fileYes · 77% of these records are
- Graduated1988 · median 2000 among the 564 with a school on file
- Record last updated2023 · 54% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RG0100X and a New Jersey practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Gastroenterology Physician providers in New Jersey
There are 735 gastroenterology physician records in New Jersey.
All 735 in New Jersey → Every provider in Rutherford → Gastroenterology Physician nationwide →
The 8 gastroenterology physician records with the nearest ZIP codes
- Jeffrey Shrensel, MDClark, NJ 070661366785115
- David Wexler, MD FACG AGAFClark, NJ 070661386637254
- Pavan Sachan, M.D.Rahway, NJ 070651417906678
- Gary Statmore, M.D.Wood Ridge, NJ 070751588631048
- Andrew Coronato, MDScotch Plains, NJ 070761497747489
- Ruby Sampson, MDSo Orange, NJ 070791619982014
- David Goldenberg, M.D.Plainfield, NJ 070601194814624
- Alok Goyal, M.D.South Plainfield, NJ 070801003848805
Common questions
What is Kenneth Zierer, M.D.'s NPI number?
Kenneth Zierer, M.D.'s National Provider Identifier (NPI) is 1417978883, issued on Jul 21, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Kenneth Zierer, M.D. located?
The NPPES record lists a practice address at 71 Union Ave Ste 201, Rutherford, NJ, 07070. Phone: (201) 842-0020. Providers update this record themselves, so call before visiting.
How can I verify Kenneth Zierer, M.D.'s license?
NPPES lists New Jersey license number 25MA5838900, as entered by the provider. Search the New Jersey State Board of Medical Examiners at https://newjersey.mylicense.com/verification/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Kenneth Zierer, M.D. prescribe under Medicare Part D?
In 2024, Kenneth Zierer, M.D. had 1,223 Medicare Part D claims for 305 beneficiaries; the average among gastroenterology physician prescribers was 811. Part D covers Medicare prescriptions only.
What is Kenneth Zierer, M.D.'s MIPS final score?
The 2023 MIPS final score is 100 of 100. The average among 454,083 clinicians with a measured score was 83.5.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.